ELETRONICS INFORMATION

0.0(0)
Studied by 0 people
call kaiCall Kai
Locked
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/70

encourage image

There's no tags or description

Looks like no tags are added yet.

Last updated 3:00 AM on 8/25/26
Name
Mastery
Learn
Test
Matching
Spaced
Call with Kai
Chat

No analytics yet

Send a link to your students to track their progress

71 Terms

1
New cards

What is electricity?

The movement or presence of electric charge. — O movimento ou a presença de carga elétrica.

2
New cards

What is electric current?

The flow of electric charge through a conductor. — O fluxo de carga elétrica através de um condutor.

3
New cards

What unit measures electric current?

Ampere (amp or A). — Ampere (amp ou A).

4
New cards

What is voltage?

Electrical potential difference that pushes charge through a circuit. — Diferença de potencial elétrico que impulsiona a carga através de um circuito.

5
New cards

What unit measures voltage?

Volt (V). — Volt (V).

6
New cards

What is resistance?

Opposition to the flow of electric current. — Oposição ao fluxo de corrente elétrica.

7
New cards

What unit measures resistance?

Ohm (Ω). — Ohm (Ω).

8
New cards

What is electrical power?

The rate at which electrical energy is used or transferred. — A rapidez com que a energia elétrica é usada ou transferida.

9
New cards

What unit measures electrical power?

Watt (W). — Watt (W).

10
New cards

What is Ohm's law?

Voltage equals current times resistance: V = I × R. — Tensão é igual à corrente vezes a resistência: V = I × R.

11
New cards

If voltage increases and resistance stays the same, what happens to current?

Current increases. — A corrente aumenta.

12
New cards

If resistance increases and voltage stays the same, what happens to current?

Current decreases. — A corrente diminui.

13
New cards

What is the electrical power formula?

P = V × I. — P = V × I.

14
New cards

What is a conductor?

A material that allows electric current to flow easily. — Um material que permite que a corrente elétrica flua facilmente.

15
New cards

Is copper a conductor or an insulator?

A conductor. — Um condutor.

16
New cards

What is an insulator?

A material that strongly resists the flow of electric current. — Um material que oferece grande resistência ao fluxo de corrente elétrica.

17
New cards

Is rubber a conductor or an insulator?

An insulator. — Um isolante.

18
New cards

What is a circuit?

A path through which electric current can flow. — Um caminho pelo qual a corrente elétrica pode fluir.

19
New cards

What is a closed circuit?

A complete path that allows current to flow. — Um caminho completo que permite o fluxo de corrente.

20
New cards

What is an open circuit?

A broken or incomplete path where current cannot flow. — Um caminho interrompido ou incompleto onde a corrente não pode fluir.

21
New cards

What does a switch do?

Opens or closes an electrical circuit. — Abre ou fecha um circuito elétrico.

22
New cards

What is a short circuit?

An unintended low-resistance path that can cause excessive current. — Um caminho não intencional de baixa resistência que pode causar corrente excessiva.

23
New cards

What does a fuse do?

Melts and opens the circuit when current becomes too high. — Derrete e abre o circuito quando a corrente fica alta demais.

24
New cards

What does a circuit breaker do?

Automatically opens a circuit when excessive current is detected and can usually be reset. — Abre automaticamente o circuito quando detecta corrente excessiva e geralmente pode ser rearmado.

25
New cards

What is a series circuit?

A circuit with one path for current. — Um circuito com um único caminho para a corrente.

26
New cards

In a series circuit, is current the same through each component?

Yes. — Sim.

27
New cards

What happens if one component opens in a simple series circuit?

Current stops throughout the circuit. — A corrente para em todo o circuito.

28
New cards

What is a parallel circuit?

A circuit with two or more paths for current. — Um circuito com dois ou mais caminhos para a corrente.

29
New cards

In a parallel circuit, is voltage the same across each branch?

Yes. — Sim.

30
New cards

What happens to total resistance when another resistor is added in parallel?

Total resistance decreases. — A resistência total diminui.

31
New cards

What happens to total resistance when resistors are added in series?

Total resistance increases. — A resistência total aumenta.

32
New cards

How do you find total resistance in a series circuit?

Add the resistances: Rtotal = R1 + R2 + … — Some as resistências: Rtotal = R1 + R2 + …

33
New cards

What is direct current (DC)?

Current that flows in one direction. — Corrente que flui em uma direção.

34
New cards

What is alternating current (AC)?

Current that periodically reverses direction. — Corrente que muda periodicamente de direção.

35
New cards

Do batteries normally supply AC or DC?

DC. — DC, corrente contínua.

36
New cards

Do typical household outlets supply AC or DC?

AC. — AC, corrente alternada.

37
New cards

What does a battery convert into electrical energy?

Chemical energy. — Energia química.

38
New cards

What is a cell in a battery?

A device that converts chemical energy into electrical energy. — Um dispositivo que transforma energia química em energia elétrica.

39
New cards

What are the two terminals of a typical DC battery called?

Positive (+) and negative (−). — Positivo (+) e negativo (−).

40
New cards

What is ground in an electrical system?

A reference or return path used for safety or circuit operation. — Uma referência ou caminho de retorno usado para segurança ou funcionamento do circuito.

41
New cards

What is a resistor?

A component designed to limit or control current. — Um componente projetado para limitar ou controlar a corrente.

42
New cards

What is a variable resistor?

A resistor whose resistance can be adjusted. — Um resistor cuja resistência pode ser ajustada.

43
New cards

What is a capacitor?

A component that stores electric charge and energy in an electric field. — Um componente que armazena carga e energia em um campo elétrico.

44
New cards

What is an inductor?

A component that stores energy in a magnetic field when current flows. — Um componente que armazena energia em um campo magnético quando passa corrente.

45
New cards

What is a diode?

A component that mainly allows current to flow in one direction. — Um componente que permite principalmente que a corrente flua em uma direção.

46
New cards

What is an LED?

A light-emitting diode that produces light when current flows correctly through it. — Um diodo emissor de luz que produz luz quando a corrente passa corretamente.

47
New cards

What is a transistor commonly used for?

Switching or amplifying electronic signals. — Para chavear ou amplificar sinais eletrônicos.

48
New cards

What is an electromagnet?

A magnet produced by electric current flowing through a coil. — Um ímã produzido pela corrente elétrica passando por uma bobina.

49
New cards

How can an electromagnet usually be made stronger?

Increase current or increase the number of coil turns. — Aumente a corrente ou o número de voltas da bobina.

50
New cards

What is electromagnetic induction?

Producing voltage by changing a magnetic field through a conductor. — Produção de tensão pela mudança de um campo magnético através de um condutor.

51
New cards

What does a generator do?

Converts mechanical energy into electrical energy. — Converte energia mecânica em energia elétrica.

52
New cards

What does an electric motor do?

Converts electrical energy into mechanical energy. — Converte energia elétrica em energia mecânica.

53
New cards

What does a transformer do?

Changes AC voltage using electromagnetic induction. — Altera a tensão AC usando indução eletromagnética.

54
New cards

What does a step-up transformer do?

Increases voltage. — Aumenta a tensão.

55
New cards

What does a step-down transformer do?

Decreases voltage. — Diminui a tensão.

56
New cards

Does a transformer normally work with AC or steady DC?

AC. — AC, corrente alternada.

57
New cards

What does an ammeter measure?

Electric current. — Corrente elétrica.

58
New cards

How is an ammeter normally connected in a circuit?

In series. — Em série.

59
New cards

What does a voltmeter measure?

Voltage or potential difference. — Tensão ou diferença de potencial.

60
New cards

How is a voltmeter normally connected?

In parallel across the component being measured. — Em paralelo com o componente que está sendo medido.

61
New cards

What does an ohmmeter measure?

Electrical resistance. — Resistência elétrica.

62
New cards

What can a multimeter commonly measure?

Voltage, current, and resistance. — Tensão, corrente e resistência.

63
New cards

What is continuity?

An unbroken electrical path that can conduct current. — Um caminho elétrico contínuo que pode conduzir corrente.

64
New cards

What does a schematic diagram show?

An electrical circuit using standardized symbols. — Um circuito elétrico usando símbolos padronizados.

65
New cards

In a schematic, what does a straight line usually represent?

A wire or electrical connection. — Um fio ou conexão elétrica.

66
New cards

What is electrical energy commonly measured in on utility bills?

Kilowatt-hours (kWh). — Quilowatt-hora (kWh).

67
New cards

How many watts are in one kilowatt?

1,000 watts. — 1.000 watts.

68
New cards

What happens to current if a circuit's voltage doubles while resistance stays constant?

Current doubles. — A corrente dobra.

69
New cards

What happens to current if resistance doubles while voltage stays constant?

Current is cut in half. — A corrente cai pela metade.

70
New cards

Why are electrical wires often covered with plastic or rubber?

To insulate the conductor and help prevent shock or unwanted contact. — Para isolar o condutor e ajudar a evitar choque ou contato indesejado.

71
New cards